e.g. C - F is a perfect fourth, C - F# is an augmented fourth, and C - F♭ is a diminished fourth.

As far as I know, he isn't attached, so I'm going to invite him out on a date.

The plan is to withdraw the Pacers from service by the end of the year.

Malkiel, however, “granted in principle the existence of a significant learned transmission of these clusters” (1963-64: 157), so even when the attribution of learnèdness is as statistically dubious as it is with fl- Malkiel felt unable to dispute it.